Question

Consider the following statements:
I. Primary index may or may not be sparse.
II. Secondary index may or may not be dense.
III.Unspanned strategy is suitable for fixed length records.
The number of the correct statements is/are _______

Answer 1

3
$\bullet$ Primary index may or may not be sparse. It depends on the attributes used for indexing same case with statements II.
$\bullet$ Unspanned strategy is suitable for fixed length records and spanned strategy suitable for variable length records.